Establishing raw acceleration thresholds to classify sedentary and stationary behaviour in children

Liezel Hurter, Stuart Fairclough, Zoe Knowles, Lorna Porcellato, Anna Cooper-Ryan, Lynner Boddy

Research output: Contribution to journalArticle

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Abstract

This study aimed to: (1) compare acceleration output between ActiGraph (AG) hip and wrist monitors and GENEActiv (GA) wrist monitors; (2) identify raw acceleration sedentary and stationary thresholds for the two brands and placements; and (3) validate the thresholds during a free-living period. Twenty-seven from 9- to 10-year-old children wore AG accelerometers on the right hip, dominant- and non-dominant wrists, GA accelerometers on both wrists, and an activPAL on the thigh, while completing seven sedentary and light-intensity physical activities, followed by 10 minutes of school recess. In a subsequent study, 21 children wore AG and GA wrist monitors and activPAL for two days of free-living. The main effects of activity and brand and a significant activity × brand × placement interaction were observed (all p < 0.0001). Output from the AG hip was lower than the AG wrist monitors (both p < 0.0001). Receiver operating characteristic (ROC) curves established AG sedentary thresholds of 32.6 mg for the hip, 55.6 mg and 48.1 mg for dominant and non-dominant wrists respectively. GA wrist thresholds were 56.5 mg (dominant) and 51.6 mg (non-dominant). Similar thresholds were observed for stationary behaviours. The AG non-dominant threshold came closest to achieving equivalency with activPAL during free-living.
Original languageEnglish
Pages (from-to)1-18
JournalChildren
Volume5
Issue number12
Early online date19 Dec 2018
DOIs
Publication statusE-pub ahead of print - 19 Dec 2018

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Child Behavior
Wrist
Hip
Thigh
ROC Curve
Exercise
Light

Keywords

  • accelerometers
  • wearable technology
  • activity classification
  • cut points

Cite this

Hurter, Liezel ; Fairclough, Stuart ; Knowles, Zoe ; Porcellato, Lorna ; Cooper-Ryan, Anna ; Boddy, Lynner. / Establishing raw acceleration thresholds to classify sedentary and stationary behaviour in children. In: Children. 2018 ; Vol. 5, No. 12. pp. 1-18.
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Establishing raw acceleration thresholds to classify sedentary and stationary behaviour in children. / Hurter, Liezel; Fairclough, Stuart; Knowles, Zoe; Porcellato, Lorna; Cooper-Ryan, Anna; Boddy, Lynner.

In: Children, Vol. 5, No. 12, 19.12.2018, p. 1-18.

Research output: Contribution to journalArticle

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